Blank for gun barrel, method for producing said gun barrel and gun barrel

Abstract

Blank for a gun barrel, consisting of a steel bar, which bar, in one or more hot working steps, has been repeatedly wrung about its own longitudinal axis.

What is claimed is:  
     
       1. A method for producing a gun barrel, comprising: 
       providing a steel bar;  
       wringing the steel bar about its longitudinal axis to a pitch angle of 45-90° in at least two hot working steps while allowing the steel bar to, at least partly, re-crystallize between the hot working steps; and  
       at least one of drilling and battering the steel bar so-processed along its longitudinal axis.  
     
     
       2. The method of  claim 1 , wherein the pitch angle is 60-88°. 
     
     
       3. The method of  claim 1 , wherein the pitch angle is 75-87°. 
     
     
       4. A method for producing a gun barrel, comprising: 
       providing a steel bar;  
       wringing, in a single hot working step, the steel bar about its longitudinal axis to a pitch angle of 45-90°; and  
       at least one of drilling and battering the steel bar so-processed along its longitudinal axis,  
       wherein the step of wringing is performed sufficiently slowly to avoid local overheating.  
     
     
       5. A gun barrel comprising steel that has been repeatedly wrung about its longitudinal axis in at least one hot working step, the steel having been wrung about its longitudinal axis to a pitch angle of 45-90°, the steel bar further having been produced by powder metallurgy, wherein the steel bar comprises a compound material, a first, mainly wear resistant, steel material being arranged towards a center of the bar, and a second, mainly strong, steel material being arranged towards an area outside of the center of the bar, and the steel bar having been one of (i) allowed to re-crystallize between hot working steps and (ii) precluded from local overheating by performing the at least one hot working step in a sufficiently slow manner. 
     
     
       6. The gun barrel of  claim 5 , wherein the steel bar is manufactured from at least two steel materials of different chemical composition, of which at least one consists of a powder, which steel materials have been treated to form a consolidated body, and wherein the consolidated body has been exposed to plastic machining to form the steel bar, the two steel materials of different chemical composition having been selected such that each can be etched with different etching results, so that the gun barrel comprises a decorative surface pattern, by etching. 
     
     
       7. The gun barrel of  claim 6 , wherein said second steel material being arranged alternating with a third steel material, whereby at least said second and third steel materials are selected to have chemical compositions that allow each to be etched with different etching results, so that the gun barrel comprises a decorative surface pattern, by etching.